Valve-spring compressor



R. s, BAINBRIDGE.

VALVE SPRING COMPRESSOR.

APPLICATION FILED OCT. 12. 1920.

1,405,253, Patented Janfi31, 1922.

I N VEN TOR. if, 45. 3am hvdga ATTORNEY.

a spaced points on opposite sides of the threaded opening therein are two rods or" V invention.

Specification of Letters Patent.

VALVE-SPRING COMPRESSOR.

Patented J 31, 1922.

Application 11166. October 12,:1920L Serial 1T0.' 416,369.

To all whom/it may conoerm Be it known that I, ROY S. BAINBRIDGE, a citizen of the United States, residin at Auusta, in. the county of Butler and State of (ansas, have invented new and useful Improvements in a Valve-Spring Compressor, of which the following is a specification.

This invention relates to valve spring compressors for use especially on Buick cars.

The object of the invention is to provide a simple and eflicient device for compressing and retaining under compression the springs of valves for removing and replacing with ease the valve spring cap key and permit the valve to be removed from its cage for the purpose of grinding both the valve and its seat or assembling a new valve.

Another object is to provide a device of this character which is extremely simple and compact having few parts which are readily assembled rendering the tool cheap to manufacture and yet strong and durable and which may be quickly applied and removed. With these and other objects in view, the invention consists in certain novel features of construction as hereinafter shown and described, and then specifically pointed out in the claims, and in the drawings illustrative of the preferred embodiment of the 7 In the accompanying drawing:

Figure 1 represents a side elevation of the compressor constituting this invention shown applied.

Figure 2 is an end elevation thereof, and

Figure 3 is a side elevation taken in a plane at right angles to Figure 1.

v The compressor constituting this invention comprises a pair of complemental plates 1 and 6 which may be of any desired configuration being here shown oval, the plate 1 having on its outer face a longitudinally extending boss 2 through the center of which and plate 1 is a screw threaded opening to receive an operating screw 7, presently to be described. I

Secured to the plate lat longitudinally fingers 3 and 4, here shown arranged parallel throughout the greater portion of their Y length with their free ends converging and provided at their terminals with inturned hooks 5 Which are designed to engage the valve spring cap or cup-shaped washer :10 mounted on the outer end of the I valve spring'Sf l The plate 61s loosely mounted to slide on the fingers or rods 3 and'ft and againstthe outer face of which the pointed terminal 9 of the screw 7 is designed to abut. This screw 7 hasa finger grip or head 8 at its outer end to facilitate the manipulation thereof.

The valve is shown mounted in a casing or cage C and the stem 5 thereof extends through said casing and through the spring S having a transversely arranged aperture in its outer end to receive a key 11 for hold ing the spring in compressed position on the stem between the end of the casing O and the pin or key 11.. v

In theuse of this compressor, the plate 6 is positionedto bear on the outer face of valve V while the hooked ends 5 of the fin gers 3 and 4. are engaged with the cupshaped washer 10 at the outer end of the valve spring S. When so positioned, the screw 7 is turned to move inwardly against plate 6 so that the coiled sprin S is compressed 'be tween the valve casing S and the hooked fingers of the compressor. This turning of the to be turned loosely therein for grinding both the valve and its seat, it being of course well understood that a grinding compound is inserted between the valve and its seat toaccomplish the grinding thereof when the valve is rotated. 7

After the valve and its seat have been ground, the parts are assembled by. placing the valve in the casing C positioning spring S. on the stem 8 and then connecting up the clamp-like compressor in the manner above described and compressing spring S sufficiently to' permit the insertion of key 11.

I The casing Cmay then be replaced in the. engine and the compressor on another valve.l

The preferred embodiment of the invention is disclosed in the drawings and set forth in the specification, but itrwill be understood that any modifications within the scope of the claims maybe made in the construction 1. A valve spring compressor comprising a plate, a pair of parallel laterally spaced arms rigidly fixed at one end to said-plate, with a screw operating through the plate be tween said arms, a plate mounted to slide.

loosely on said arms in advance of said screw to be engaged thereby, said arms having spring engaging means at their free ends so positioned that the compressing action of the tool is exerted longitudinally thereof between said plate and ends. I r

2. A compressor of the class described 1 ,aoaase comprising a pair of complemental plates arranged one-over the other, an operating screw threaded through one of said plates, with its end engaged with the other, rods rigidly fixed atone end to the inner face of said screw carried plate and extended loosely throughthe other plate, said rods having in- 7 turned hooks, at their free ends to engage one end of a coiled spring to be compressed, the member carrying said spring being engaged by the outer face oftlie movable plate, whereby the compressing actionof the tool is exerted longitudinally thereof. p

'In testimony whereof, I 'affi'x my signature hereto.

ROY S. BAINBRIDGE. 

